<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/logo2.png" alt="" />
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区 -->
                <el-menu
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#409eff"
                    unique-opened
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    router
                    :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{ item.authName }}</span>
                        </template>

                        <!-- 二级菜单 -->
                        <el-menu-item
                            :index="'/' + subItem.path + ''"
                            v-for="subItem in item.children"
                            :key="subItem.id"
                            @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{ subItem.authName }}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容主体 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        data() {
            return {
                //左侧菜单数据
                menulist: [],
                iconsObj: {
                    125: 'iconfont icon-yonghuhaoyou',
                    103: 'iconfont icon-shoucang',
                    101: 'iconfont icon-24gf-bag',
                    102: 'iconfont icon-wodedingdan',
                    145: 'iconfont icon-shujutongjixuanzhong',
                },
                //是否折叠
                isCollapse: false,
                //被激活的链接地址
                activePath: '',
            };
        },
        created() {
            this.getMenuList();
            this.activePath = window.sessionStorage.getItem('activePath');
        },
        methods: {
            logout() {
                window.sessionStorage.clear();
                this.$router.push('/login');
            },
            //获取所有的菜单
            async getMenuList() {
                const { data: res } = await this.$http.get('menus');
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
                this.menulist = res.data;
                console.log(res);
            },
            //点击按钮切换菜单的折叠与展开
            toggleCollapse() {
                this.isCollapse = !this.isCollapse;
            },
            //保存链接的激活状态
            saveNavState(activePath) {
                window.sessionStorage.setItem('activePath', activePath);
                this.activePath = activePath;
            },
        },
    };
</script>

<style lang="less" scoped>
    .home-container {
        height: 100%;
    }
    .el-header {
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: #fff;
        font-size: 20px;
    }
    .el-header div {
        display: flex;
        align-items: center;
    }
    .el-header div span {
        margin-left: 15px;
    }
    .el-aside {
        background-color: #333744;
    }
    .el-aside .el-menu {
        border-right: none;
    }
    .el-main {
        background: linear-gradient(
            to top,
            #d16ba5,
            #c777b9,
            #ba83ca,
            #aa8fd8,
            #9a9ae1,
            #8aa7ec,
            #79b3f4,
            #69bff8,
            #52cffe,
            #41dfff,
            #46eefa,
            #5ffbf1
        );
    }
    .iconfont {
        margin-right: 10px;
    }
    .toggle-button {
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>
